[jcifs] Seven jCIFS bug fixes from Google.

[Brett Johnson]

The Google changes were not included in v1.3.18,
although that release did include a less-robust fix
for one of the issues. Google moved their open source
repositories to GitHub a couple of years ago. Its
jCIFS modifications can be found at:

https://github.com/googlegsa/filesystem.v3/tree/master/projects/jcifs

It should be noted that Google plans no further
changes to jCIFS.

—
Brett M. Johnson